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Developer-C 11.1
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create table COMPANY (id int primary key); insert into COMPANY (id) values (18), (19), (20), (21);
UPDATE IGNORE COMPANY SET id='21' WHERE id = '20'
SELECT * FROM COMPANY
id
18
19
20
21
UPDATE IGNORE COMPANY SET id='100' WHERE id = '20'
SELECT * FROM COMPANY
id
18
19
21
100